FRIDAY – Stock index futures tanked on Friday morning, as investors feared President Donald Trump’s surprise threat of tariffs on all Mexico imports, amid a worsening trade war with China, could risk sending the U.S. economy into a recession.

Around 8:25 a.m. ET, Dow Jones Industrial Average futures indicated a drop of 270 points at the open. Futures on the S&P 500 and Nasdaq dropped by more than 1% each. The S&P 500 was already down 5.3% this month through Thursday after trade talks fell apart with China and rhetoric on both sides worsened in May.

The closely watched 10-year Treasury yield dropped to lows not seen since 2017. The U.S. benchmark was yielding 2.17% Friday morning. It was above 2.5% at the beginning of the month. Mexico’s currency, the peso, tanked against the dollar by more than 2% to trade at 19.6 per dollar.

On Thursday evening, Trump announced the U.S. would impose a 5% tariff on all Mexican imports from June 10 until illegal immigration across the southern border was stopped.

The trade war appears to be dragging down the Chinese economy. The country’s manufacturing activity contracted more than expected in the month of May, China government data out overnight showed. The official manufacturing Purchasing Managers’ Index (PMI) for May was 49.4, down from April’s reading of 50.1. PMI readings below 50 signal contraction.